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Roadmaster Guardian Rock Guard for Towed Vehicles
(57 reviews)
Price: $615.00
In Stock
Roadmaster
Roadmaster Guardian Rock Guard for Towed Vehicles
Part Number: RM-4000
In Stock
$615.00
Retail:$1,276.56
You Save: $661.56
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- All Info
- Reviews (57)
- Q & A (0)
- Videos (3)
- Photos
- Used (1)
Roadmaster Accessories and Parts - RM-4000
- Tow Bar
- Vehicle Guards
- Rock Guard
- Roadmaster
- Guardian
Get heavy-duty protection for the front of your towed vehicle. Thick polyethylene shield fends off rocks and debris from your bumper and headlights while you're flat towing. Mounts and removes quickly for each trip.
Features:
- Protects the entire front bumper of your towed vehicle from rocks and debris
- Stands up to rough road and weather conditions
- Made of thick, high-impact polyethylene
- Mounts and removes quickly
- Center panel slides onto the quick disconnect brackets and attaches with linch pins
- Side panels fasten to center panel with slide-in connecting rods
- Limited lifetime warranty
Specs:
- Fits: Roadmaster crossbar-style tow bars with quick disconnects
- Dimensions: 26" tall x 71" long
- Total weight: 67 lbs
Note: You can swap the Guardian Rock Guard to your second towed vehicle with a second vehicle kit (RM-4000-1 - sold separately).
4000 Road Master Guardian Rock Shield for Toad
Installation Details
Video of Roadmaster Guardian Rock Guard for Towed Vehicles
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Video Transcript for All About the Roadmaster Guardian Rock Guard for Towed Vehicles
Speaker 1: Today we're going to be taking a look at the Roadmaster Guardian Rock Guard, part number RM-4000. When we go to flat tow a vehicle, we have a lot of issues with road debris flying up and hitting the front of our vehicle. Whether it be rocks or gravel or anything else, we don't want the paint to be scratched, let alone a headlight broken. Our Guardian's going to protect the front of our vehicle and make sure the paint stays in nice condition, as well as the headlights. Our Guardian's going to be made out of a molded polyethylene material with a hollow core, so it's going to be extremely durable but also very lightweight.Now our Guardian is going to be compatible with all Roadmaster base plates that have the quick disconnect style crossbar, which is sold separately. This center section of our Guardian is going to be attached directly to the base plate on a bracket, and the two side panels are going to have a connecting rod that's going to connect those to the center.
Now, because of its design, we're going to be able to remove in a manner of seconds and actually fold the sides in for a smaller footprint so we can store it.One of the nice things about our Guardian is that it does remove extremely easily and is easy to store. We can simply just pull those pins out, loosen up those thumb screws and we can pull the whole assembly off and set it aside. And that will finish up your look at the Roadmaster Guardian Rock Guard, part number RM-4000.
Customer Satisfaction Score:
81% were satisfied with this product
19% of customers were not satisfied
- etrailer mistake
- Product did not meet expectations
- Wrong item was ordered
Ratings & Reviews
4.9
57 reviews
by:
Chuck
06/30/2025
The Roadmaster Guardian is very well made and fit my vehicle perfectly. It is lightweight, but certainly strong enough to protect my truck.
by:
randy
05/21/2021
Received way earlier than was projected! Installation was a snap, quality of product is as advertised and it is exactly what I need for front end protection! Even with a mud flap on the coach there was still a tremendous amount of gravel hitting the pickup! NO MORE!! Strongly recommend!er
by:
Bo
08/02/2018
Simple design, easy to use. Perfect fit for my towed vehicle. No longer have stones sitting on the windshield after a trip.
by:
SanfordTurbo
08/18/2020
Installation was a breeze. Quick to mount, quick to remove, quick to store.
by:
Arizona Slim
06/24/2022
Very nice and sturdy protection for the front of the towed vehicle. Easy to assemble, attach, remove and store. I was surprised by how rigid it was even at highway speeds.
by:
Ric
04/09/2020
I purchased the Roadmaster Crossbar-Style Base Plate Kit w/ Removable Arms, The Roadmaster Nighthawk Tow Bar, Quick Disconnect Crossbar, Universal Hy-Power Diode Wiring Kit, and Roadmaster Guardian Rock Guard in order to tow my 2020 Ford Raptor behind my Class A. Everything bolted on beautifully and the craftsmanship was fantastic. Ordering from etrailer was easy and the parts arrived within a few days with no problem. I watched numerous [online] videos to learn how to install everything and they saved me a lot of time. Overall, I'm very happy.
by:
Joe b
01/28/2017
Best price,free shipping,no tax.what else can i say.patrick did a fantastic job from a to z
Joe B.
1/28/2018
Really good. thank you!!
by:
Pete
01/04/2018
Hi George, all the products that I purchased from you guys arrived in a timely manner and installed on my 2017 Jeep. Good instructions and good products. I sent you a picture of my install.
by:
Garth
07/06/2015
The rock guard is easy to install. It provides a good amount of protection for the vehicle. It is light fairly light weight sturdy.
I use it on my Ford Xplorer along with the roadmaster rowboat and vehicle brackets
I use it on my Ford Xplorer along with the roadmaster rowboat and vehicle brackets
by:
Cookie
12/12/2013
I won't have a chance to actually use this for a couple of weeks, but I have no reason to doubt I will be highly pleased with it as others have been. For now, I just want everyone to know what a FANTASTIC place etrailer is to do business with. My Guardian arrived much sooner than I expected. This is a company that really delivers. Best company I have ever dealt with. I will update my review later. If you are going to get this, I highly recommend the Stowawy which allows you to easily store the Guardian on the hitch receiver on your motorhome.
by:
Tim
08/08/2022
The parts and hardware all arrived in good shape despite the beat up condition of the box. It was easy to assemble and provided everything I needed to mount to my Roadmaster Tow dolly. Easy to remove the guard and fold up for storage inside. It was a bit expensive, but I'm hoping it will save the front hood and windshield of my Mini.
by:
Gene R.
04/01/2015
a good solid product by Roadmaster that looks to protect the front end of my Jeep Grand Cherokee . the install went well with only one small problem, the Stowmaster tow bar pop-ups interfere with the RM-4000 when in the store position. Other than that it is a well built product.
by:
Ronald
08/20/2019
Once you install the guardian carrier installing the Guardian is a breeze. The important step in the installation of the carrier and the guardian is driving your car onto the dolly to make adjustments to the carrier and guardian reference your vehicle. After you get it all together lt looks good and works. I'd buy it again.
by:
Michael
10/20/2021
Works great with my tow bar system and protects my tow vehicle very well.
Michael
10/21/2022
Still working good.
by:
Patrick
01/21/2022
This rock guard will deflect anything you might kick up. Be sure to get the right guard for your tow hitch.
by:
John O.
08/31/2019
I received the RM-400 on time, watched the installation video and installed it. I haven't used it yet but I'm confident it will do the job keeping the front end of our car protected while towing behind the motorhome.
However, the box didn't have the thumb screws.
However, the box didn't have the thumb screws.
by:
Wayne
10/17/2020
The product arrived in two business days, absolutely amazing. Installation was easy and works great. What else can you say? Roadmaster items are well engineered and and always work together when they say it does. As long as you do the research on products, etrailer gets it to you fast.
by:
Timothy
05/01/2018
Received a day earlier than expected. Janice took my order and walked me thru the process on how it attached it. She was right on. Looks good on my 2007 Ford Ranger. Took about a half hour to mount. Every time I order from etrailer. It's always the right part I needed.
by:
Dennis G
10/10/2015
The Rock Guard that came is as I ordered. As i had faith it would be. My first time ordering from them. They told me that it was in stock and that it would be shipped the next day and when it would arrive....It all took place...Keep up the good work.
by:
Adrien A
12/17/2017
Great product, great price,fast shipping and easy to install..... I also went with the RM# 4750 for the extra protection...... Thanks to Sandy J. for all the help....you're so very helpful...... Adrien A
by:
Pete M
10/01/2014
Looks like a well made product. I have mounted it, but won't road test it until next week. As always prompt shipping from etrailer.
by:
Bill B.
08/11/2012
and easy to assemble. Another quality product from Roadmaster.
by:
Doyle
07/05/2020
I towed my 2019 Silverado Pickup behind my Motorhome from Lincoln, NE to Yellowstone National Park and everything worked great and was easy to hook up.
by:
Tom
06/06/2024
Could not use it, had to change to the Defender - I miss ordered this unit
by:
Darren
04/05/2023
Easy installation.
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Brooke M.
7/9/2025
Looks awesome, Chuck! Been on any recent trips where you've had to use it? Where did you go?